You receive a Resurrection Potion at the start of this quest. Head to the southern portion of Ettinmere to find the Ballads Oratory. In the center area
you can find King Wencen. Talk to him and check out the Fae cache before
leaving to Uduath in the northeast corner of Ettinmere. Loot the chest at the
entrance and go south at the split. Give Sir Farraraa hand with the Sprites
then open the cell. Go west to fight some Brownies, loot a chest, open a cell,
then loot another chest in the cell area.

Progress north and kill the Sprites and Brownies, then loot the chest and open another cell. Continue along the path for more of the same, Brownies, a
chest and a cell. As you move east watch out for the poison trap.

You will
eventually reach the last area with Brownies, a chest, and a cell. Move east
to find Bloody Bones and a chest. After the conversation kill Bloody Bones and
the Sprites that assist him. Resurrect Farrara then enter the far east room to
find a Fae cache then leave Uduath and return to the House of Ballads.

Tip- Use your Reckoning when battling Bloody Bones and the Sprites. The final battle is a ton easier using Reckoning and you have the potential of gaining close to 4,000 Experience Points (level-dependant).

PS3/Xbox 360/PC (DVD version) - It is possible once you have defeated Bloody Bones that the dialog option will mistakenly say "Talk to Sir Farrara" instead of "Resurrect." The talk option will not work, and you will not be able to resurrect him. To get around this bug, exit and reenter Uduath. Make your way back to the chamber in which the battle took place, and the correct option will present itself, allowing you to continue the quest.

PS3 version - When battling Bloody Bones it is possible for him to fall off the platform inside his chamber. When this happens there is now way to slay him and therefore no option to revive the fallen Fae. The quest is stuck unless you have a pre-battle save to restore.